The best things in life really are free. And when it comes to playthings, you can't beat a cardboard box. Lenore Grubinger, a developmental specialist from Northampton, Massachusetts, suggests turning one into a tunnel for a pint-size version of full-body peekaboo (an activity that lets your baby practice leaving and coming back to you, a skill he'll need for walking later on).
In addition to boxes, your house is full of playthings and other objects that get kids moving. Consider these fun ways to play with some of them:
To make one, first find a large box and be sure there aren't any staples poking out. Cut off at least three of the flaps on opposite ends of the box, leaving 3 or so inches on the right and left sides to help support the structure, as shown above.
Decorate it if you like (we used a little colored electrical tape). Now put your child's favorite toy inside to get her attention and let her practice scooting in and out of it.F
For added fun: Tape a fabric curtain over one or both ends of the box so your little crawler can really make a grand entrance.