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.
Because of the jostling of the bicycle or trailer, and the additional weight of a helmet (8-10 oz.), the start time is usually a few months after a baby can first hold their head up. Note: Some jurisdictions have laws requiring passengers on bicycles to be at least one year 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.