A few years ago I had a set of twins that idolized glue. They’d slap a piece of paper down like a pancake, and squirt a big ol’ puddle of glue on it like syrup, and repeat that until they had a stack. These Tap-N-Glue toppers were a life saver. They act like a stopper, so you can’t make enormous puddles. (You’ll have to explain how to use them on your first day of using glue bottles.)
I haven’t tried these yet, but this would have saved me from drilling so many anchors for things I was worried might fall down!
However, don’t order them from this site – their credit card processing isn’t secure, though they say it is. (See comment below.)