The idea of this bike is genius! My niece and nephew had their Strider bikes since before they could walk. They figured out how to ride and 2 months ago, at 3 years old they learned to ride a 2 wheel bike with pedals in about 10 minutes. Their Strider bikes held up just fine and did the job they were meant to do.
You may want to invest in some shoes with a good toe as these 2 kids would drag their toes to stop. And don't forget the helmet!