it’s not very hard to build up a bit of speed down the slide. Just make sure to have them let go before the end of the slide. Now just wait for a warm day, collect the neighborhood kids ...

By investing just two hours, you can build this ... those slits apart, slide in a fender washer, and screw the noodle to the wall with 2-in. screws. Then screw the PVC pipe to the wall beneath ...