Answers.Body: <p>Those are Sports Field Sections 8 x 16</p>
  
  <p><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=30489" rel="noreferrer">https://www.bricklink.com/v2/catalog/catalogitem.page?P=30489</a></p>
  
  <p><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=41819c02" rel="noreferrer">https://www.bricklink.com/v2/catalog/catalogitem.page?P=41819c02</a></p>
  
  <p>They appear in soccer sets</p>
  
  <p><a href="https://i.sstatic.net/FyozP.png" rel="noreferrer"><img src="https://i.sstatic.net/FyozP.png" alt="enter image description here"></a></p>
  
  <p>The sets are playable, you can move minifigs on springs to "shoot" the ball, or defend with the goal keeper minifig...</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-10T15:21:33.813Z
Answers.Text: Here's an upvote for posting the correct answer 31 seconds before me :)
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-10T15:42:32.147Z
Answers.Text: Upvote reciprocated ;)
Answers.UserDisplayName: Michael Verschaeve
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-10T15:14:22.627Z
Answers.LastActivityDate: 2020-03-10T15:43:44.987Z
Answers.LastEditDate: 2020-03-10T15:43:44.987Z
Answers.UserDisplayName: Michael Verschaeve
Answers.Body: <p>These belong to the <a href="https://www.bricklink.com/catalogItemIn.asp?P=41819c02&amp;in=S" rel="noreferrer">Football subtheme</a>, the parts are specificially <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=41819c02&amp;idColor=6#T=S&amp;C=6&amp;O=%7B%22color%22:6,%22iconly%22:0%7D" rel="noreferrer">Sports Field Section 8 x 16 with Horizontal Slot and Black Sliding Holder, Assembly</a> and <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=30489#T=S&amp;O=%7B%22iconly%22:0%7D" rel="noreferrer">Sports Field Section 8 x 16</a>.</p>
  
  <p>The smaller black parts are called <a href="https://brickset.com/parts/4142816/chair-%C3%B820mm-spring-function" rel="noreferrer">4142816: Chair Ø20Mm, Spring Function</a> and were used to have the minifigures kick the ball.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-10T15:14:53.670Z
Answers.LastActivityDate: 2020-03-10T15:20:07.793Z
Answers.LastEditDate: 2020-03-10T15:20:07.793Z
Answers.UserDisplayName: zovits
Body: <p>Recently received a batch of LEGO and it contains numerous green bases and attachments for them. I’ve never seen anything similar before. Does anyone know what they are?</p>
  
  <p><a href="https://i.sstatic.net/3X0jk.jpg" rel="noreferrer"><img src="https://i.sstatic.net/3X0jk.jpg" alt="enter image description here"></a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-03-12T18:17:25.760Z
Comments.Text: Welcome to Bricks.SE!  Thanks for asking this.  I picked a few of the 30489's up at a bulk purchase, but I had never figured out what they came from.  I stacked them up to make a stand for one of the Ghostbusters cars.
Comments.UserDisplayName: chicks
Tags: <part-identification>
Title: Identification help for green bases
UserDisplayName: user13929
ThreadText: # Identification help for green bases
  
  (Asked by: username_0 on 2020-03-10)
  
  Recently received a batch of LEGO and it contains numerous green bases and attachments for them. I’ve never seen anything similar before. Does anyone know what they are?
  
  [![enter image description here](https://i.sstatic.net/3X0jk.jpg)](https://i.sstatic.net/3X0jk.jpg)
  
  **Tags:** part-identification
  
  > **Comments:**
  > **username_1**: Welcome to Bricks.SE!  Thanks for asking this.  I picked a few of the 30489's up at a bulk purchase, but I had never figured out what they came from.  I stacked them up to make a stand for one of the Ghostbusters cars.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2020-03-10. Score: 11
  
  Those are Sports Field Sections 8 x 16
  
  <https://www.bricklink.com/v2/catalog/catalogitem.page?P=30489>
  
  <https://www.bricklink.com/v2/catalog/catalogitem.page?P=41819c02>
  
  They appear in soccer sets
  
  [![enter image description here](https://i.sstatic.net/FyozP.png)](https://i.sstatic.net/FyozP.png)
  
  The sets are playable, you can move minifigs on springs to "shoot" the ball, or defend with the goal keeper minifig...
  
  > **Comments:**
  > **username_3**: Here's an upvote for posting the correct answer 31 seconds before me :)  
  > **username_2**: Upvote reciprocated ;)  
  
  ---
  
  ### Answer by username_3 on 2020-03-10. Score: 6
  
  These belong to the [Football subtheme](https://www.bricklink.com/catalogItemIn.asp?P=41819c02&in=S), the parts are specificially [Sports Field Section 8 x 16 with Horizontal Slot and Black Sliding Holder, Assembly](https://www.bricklink.com/v2/catalog/catalogitem.page?P=41819c02&idColor=6#T=S&C=6&O=%7B%22color%22:6,%22iconly%22:0%7D) and [Sports Field Section 8 x 16](https://www.bricklink.com/v2/catalog/catalogitem.page?P=30489#T=S&O=%7B%22iconly%22:0%7D).
  
  The smaller black parts are called [4142816: Chair Ø20Mm, Spring Function](https://brickset.com/parts/4142816/chair-%C3%B820mm-spring-function) and were used to have the minifigures kick the ball.
  
  
  ---
  
  