Also on these boards
How to build a simple wood water balloon launcher - this is SO fun!
Water Balloon Name Game~Fun Summer Learning Activity from Fantastic Fun and Learning
DIY Balloon Surprise - I did this for my grandkids - not Helium balloons but reg. and filled them with money and small gifts - mailed it to them and they loved it! Big box arriving filled with fun as they opened it and then as the balloons were busted new surprises. I borrowed this from a friends sister...great idea!