Stomp Rocket Ultra Rocket Launcher for Kids, 4 Rockets - Fun Backyard & Outdoor Kids Toys Gifts for Boys & Girls - High Flying Toy Foam Blaster Set - Multi-Player Adjustable Launch Stand

Stomp rockets and bottle rockets are your two best bets if you can’t use the little Estes motors. https://www.amazon.com/Aquapod-Bottle-Launcher-Launch-Bottles/dp/B003Y5DOJC/ref=asc_df_B003Y5DOJC?mcid=ecab2b0c6c9f3292a5c7bde7c263e176&hvocijid=16362633265403218586-B003Y5DOJC-&hvexpln=73&tag=hyprod-20&linkCode=df0&hvadid=730432682330&hvpos=&hvnetw=g&hvrand=16362633265403218586&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9007577&hvtargid=pla-2281435180218&psc=1 https://www.amazon.com/Stomp-Rocket-Launcher-Kids-Backyard-Outdoor-Toys-Gifts/dp/B0006O8Q7Y It’ll be hard to make a Saturn V replica but these will make stuff fly. You might be able to rework the bottle or the foam rockets to look more like the moon rocket.