Does anyone in your district get on you effectively giving away equipment every year? I'm just asking for you to consider.

I know that your gift wouldn't work in my district even though the heads aren't viable anymore after a year of hard use. Just like our PE folks can't give away practice jerseys - they have to recycle or throw them out. Someone would find out and complain.

I'd make sure you had documented written permission from your district level folks to "discard broken/worn consumable equipment as you see fit and necessary" to shield yourself. Given how litigious people are getting about literally everything in education, some rectal-cranial inverted person is going to complain that you're "giving away school equipment to the kids" and "wasting thousands of taxpayer dollars" at some point. There are tons of people just looking for reasons to be mad.

Our core teachers are required to collect consumable workbooks every year and recycle them rather than allow kids to take them home at the end of the year. It can be taken that seriously. Make sure you protect yourself.

All that being said, super cool idea.