The best resources are local!   Individuals like to help those within their community.  You might wish to try some of the following:

Local businesses may have a matching fund or volunteer program, e.g. 

Grants – specific to your activity, school, program etc. – look into things you can qualify for

Parents – instead of asking for pens, paper – ask for Active Learning Supplies (ping pong balls, whisks, harmonicas,  whistles, etc.) Ask parents to help make resonance boards, sand or varnish purchased kits from Lilliworks to make essef boards, etc.)

Sewing Clubs – might make bunchers, make activity vests, Velcro vests, etc.

Volunteers – to help you sand, varnish, paint, drill, adapt anything you need