frange(), a range function with float increments (Python recipe) by Dinu Gherman ActiveState Code (http://code.activestate.com/recipes/66472/) Sadly missing in the Python standard library, this function allows to use ranges, just as the built-in function range(), but with float arguments. All thoretic restrictions apply, but in practice this is more useful than in theory.
When I worked at a daycare we would have bike day during the summer when kids, aged 3-5, could bring in their bikes and ride them, most of the kids were on big bikes with training wheels and a few of the 4-5 year olds were without training wheels.
The first exciting solo steps may be taken, though it's normal for toddlers to walk any time between nine months and 17 and a half months (Sheridan 2014). Your child's outstretched arms while she walks help her to keep her balance. 14 to 15 months. Most toddlers can walk at this age. Your child may enjoy push-and-pull toys (Sheridan 2014), such as toy trucks or animals on wheels, and she may even be able to walk backwards. Ask for help if ... your toddler isn't walking by 14 months or 15 months, you could mention it to your health visitor or doctor if you have concerns.