Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to support your baby's development [title] Play with your baby. [step] Playing is the way that babies learn. It allows them to explore their own bodies, the world around them, and their own minds.

Ending1: Although it takes some time to develop, you can eventually encounter your baby, hold them in your arms or cuddle them. Try this : [substeps] Set up an outdoor play area. Ending2: Engage your baby in activities that make them smile and laugh to support their mental growth. [substeps] Play peek-a-boo and other games with your baby to interact with them. Ending3: By playing with your baby, you can introduce them to different ways of learning, from observation to touch, technology, music. [substeps] If your baby is not allowed to dance, direct your baby to a nearby candy, dog, or doll. Ending4: Without play, your baby may not be able to grow new. [substeps] Play with your baby on the floor, with toys or in the car.

Answer format: ending1/ending2/ending3/ending4