Add flexible tubes to your ramp collection.
other flexible tubing, such as hoses from sump pumps or shop vacs—found in the plumbing section of hardware stores—cut into 4- to 6-foot lengths.
objects to roll or slide down the ramps: markers, rolls of duct tape, balls of various sizes and weights, toy cars, paper clips, plastic utensils, balls small enough to fit through the tubes, etc.
various tubes: toilet paper and paper towel tubes, cutting some lengthwise in half to make open troughs; poster tubes; PVC tubes; and wooden molding of different lengths, if available.
Flexible tubes allow children to create ramps with curves, loops, and hills. Working with flexible hoses usually requires more motor coordination than rigid ramps, which makes it good for partner and small group work.