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.
Usually by age 12 months parents can start checking with the child's physician to see if they have the neck development to safely go for a bike ride. Most toddlers' neck and shoulder muscles can tolerate the weight of a helmet and absorb shock from bumps in the road at 1 years old.nd, some jurisdictions have laws requiring children to wear helmet, include when they are riding in a trailer. Conceptually, a infant seat setup, used on smooth roads, combined with a good shock-absorption system and good head-neck-back support would be safe for an infant sooner.