Technically there's things like this: https://makezine.com/projects/water-rocket-launcher/ https://makezine.com/projects/water-rocket-launcher/ and some chemica

Technically there's things like this: https://makezine.com/projects/water-rocket-launcher/ https://makezine.com/projects/water-rocket-launcher/ and some chemical equivalents, but I think the payload is probably a bigger issue than the launch mechanism.