It may be useful to give students several options for how they might want to build their spinning objects. Offering one or more of the following can help to spark ideas to explore the physics behind rotational motion.
Skateboard bearings (It is important to strip the grease off of skateboard bearings by soaking them in acetone or nail polish remover. Then apply a low viscosity lubricant like blue valve oil to ensure that the bearings spin smoothly and stay clean)
Cheap fidget spinners (to deconstruct or build on)
Spinning tops
Pins
Strong structural integrity is important for spinning objects. For an example of why, google "Exploding fidget spinner." The strongest way to keep the whole spinner together is to make it out of a single solid chunk of material such as cardboard, plastic, metal, or wood. Other forms of adhesives can be used but are not very strong against the centrifugal force generated by the spinning motion. In case you wish to attach additional weights, some adhesives can be effective:
Hot glue
Super glue
Duct tape
Zip ties
Craft materials are extremely important but can come from anything. Examples include:
Cardboard
Popsicle sticks
Plastic utensils
Paper plates
Anything else from around the house
It is important that students have access to weights to add to their spinners to explore symmetric distribution of mass, moment of inertia, and their effects on angular velocity and spin time. Some examples follow:
Pennies or other coins
Magnets
Washers and hex nuts
Marbles
Fishing weights