Hi Sarah- 

I just met with one of our tech teachers to plan our middle school makerspace club for the year.  We have run it a little differently every year, but at th middle level with the strict schedule restraints, we have found that an afterschool club works best.  We have students sign up for the sessions they want to participate in and then we are able to collect necessary supplies.  In some cases we charge a fee for the supplies (especially if they will be leaving with a takeaway).  Here's what we came up with: build a trebuchet, homemade bath bombs, 3D printing, cricut designed stickers (for waterbottles or notebooks, etc). CNC games, Water marbling, and something garden related.   We have found that sessions that hit a variety of interests get more students involved and/or have kids trying things outside their comfort zone.  

Hope this helps, 

Kristen