Please choose the correct ending to complete the given sentence: Youth: [header] How to build a pyramid for school [title] Gather your supplies. [step] This cardboard pyramid looks like a realistic flat-sided pyramid, but it's lightweight and doesn't take very long to put together. You probably have most of the supplies on hand already.

Ending1: For this project you will need : [substeps] A large flattened cardboard box or piece of cardboard ruler pencil scissors hot glue gun and sticks brown or black permanent marker white school glue paint brush sand [title] Cut out a cardboard square. [step] Cut out a square of cardboard that is 14 inches (35.5 cm) by 14 inches (35.5 cm). Ending2: [substeps] The size of the pyramid varies by school. Ultimately, you want it to be at least 16 inches wide and 4 inches deep. Ending3: [substeps] Start by attaching some pushpins or nail if you want to attach to the top of your pyramid. You can skip this if you don't want to build a pyramid at all. Ending4: [substeps] To build a pyramid, grab a piece of cardboard that is at least 3.5 inches (1 cm) by 3.5 inches (1 cm) long. Lay the cardboard straight across the base of your pyramid.

Answer format: ending1/ending2/ending3/ending4