Clear tubing from hardware store
PVC connectors 1/2 in and the tubing fit right in them.
Duct tape to tape to the wall
We got both the tubing and pvc connectors at Lowe's. Tubing was $.31 a foot and the connectors were $.21 to .34. I bought 10 feet of tubing and we had extra left over.
The kids had a blast and kept feeling the tubing with colored water to watch it go threw the tubes. This is a great eye/hand coordination and fine motor skill for the kids. As well as fun.
They had a blast and then took some of the tubing down and blew bubbles like it was a big straw.