At our Summer Library Program workshop, one of the groups that librarians felt they had a hard time reaching is tweens (3rd-7th graders or so).  I found  a few good resources for people who are feeling like this is a gap for them:

What Do Tweens Want (2015 SLJ Article)
Also:  remember the amazing kits that both WVLS and IFLS have collected that are available to you, ranging from low tech (woodworking, jewelry-making, needle-felting, calligraphy, knitting) to higher tech (Makey Makey, Sphero, Little Bits).  Many of these kits are perfect for this age group–it’s a golden age of MAKING.