How old are your preschoolers, and do they have bikes/trikes, etc? Do your kids enjoy them?
DD is 4.5 and is riding a balance bike but is still working on her skills before we try the big girl bike. Before this, she rode a radio flyer trike, which she really liked. She also has a big wheel trike at grandmas which she has been riding since age 3 and a Barbie scooter that she received when she was two.. She never really got the hang of the scooter until this past year but it keeps scratching her ankles up so she doesn't really like it. I'm hoping she will hurry up and get on the big girl bike so I can pass the balance bike down to DS because he is not willing to sit in the push buggy any more!