I came across this video by complete chance. As a man (which basically translates into "male that was once a boy that still likes toys"), seeing the words "mini" and "crossbow" was all it needed to get my full, undivided attention. This first video takes a little bit of prep, but it looks like it would be a great hour or two of building fun, followed by hours upon hours of play time fun.

Okay, so maybe you're not as craft/tool savvy, but you still think making mini-crossbows would be awesome. Then check out the bottom video. A lot less prep work, and no real tools (other than screwdriver) are needed.

I'm about to be the best dad ever with my tow older boys after this project.