neat idea. Hope it does not run afoul of the school security rules.

Build a breakaway link into the necklace-5 year olds do a lot of wrestling around, and it would be bad to get him strangled.

Ditch the alcohol wipes-flammable, hurts when you rub it on broken skin, damages healthy cells at wound margins, replace with packet of antibiotic ointment, or use antibiotic impregnated bandaids.