Balance bikes are a thing now :) They are for sure a great way to learn balance at a young age. Unfortunately, not all balance bikes (our regular bikes) fit for our young ones...but one company out there offers special gear especially made for little people. We bought this awesome Strider balance bike in shiny RED! Our son loves it. You can contact the company here prior to placing your order to ask for the "little person kit". It comes with a smaller, narrower saddle and smaller wheels as well. Just perfect...and tons of fun! https://www.amazon.com/Strider-Sport-Balance-Months-Years/dp/B00IZXCADO
If you're like us, chances are you're having a hard time finding a backpack that fits your achon child. My wife found the perfect one right here: https://www.fjallraven.com/kanken-mini. Large enough to put a water bottle, snacks and small books and/or (too small for school items though) and guaranteed to put a smile on the face of your young one.