This is how you can make a Hover floating style platform easily and cheaply. The main body of the unit is made from MDF (Craftwood) and a tarpaulin, and uses a portable battery powered blower vac to provide the air.
You can get up to 6 small children on there easily.
Step 1: Description of the Build
Cut out two circles of MDF - one being a full circle and the other a ring. Wrap the tarpaulin over the ring and staple it to the other side.Trim off the excess tarpaulin.
Drill a hole in the full circle piece to let the air in. Then, screw the ring to the full circle piece trapping the stapled edge between the pieces of wood.
Cut out a small round piece of wood and screw into the center of the tarpaulin side. Then, cut about 6 small holes just outside of the piece you just screwed in.
Fit a nozzle flange on the other side over the small hole you drilled for the air to go in (see step 2).
Attach the blower to the nozzle flange and power up. The platform should lift off the ground and hold your weight.