Look, your child is destined for greatness. We wont dispute that. But why wait until they can walk for them to rock their awesomeness? If theyre crawling, theyre ready tothe world. Attach the Strider Rocking Base to a Strider 12 Bike and get them rocking. The rocking base doesnt just familiarize them with a bike, the rocking motion helps develop their balance, spatial awareness, and core strength. No batteries. No annoying sounds. Just pure, rocking fun.