Here is what I put in my fort kit:
--Two sheets with ribbons sewed on the corners for tying
--A handful of clothespins
--A handful of suction cup hangers
--A pack of glowsticks
--And a bag to put it all in!
As far as costs go:
The sheets were $1 each at Goodwill and everything else I had around the house. I have seen clothespins, suction cups, rope, and glow sticks at the dollar store, too. Overall, this shouldn't be too pricey! :)
I started by sewing on some ribbon onto each of my sheets.
Then I gathered all my materials. (glow sticks aren't pictured below)
I put all the items in a cute bag I had (you could also make one if you wanted) and then added a little tag to go on top!
What a great gift idea! I hope you enjoy it, too!