I've always been a fan of putting such things on pedestals outside of public buildings, VFWs, etc. A bit less feasible with full rockets, but the engines at least would be fairly easy to put in parks so kids can climb on them.
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> Gas Works Park has a play area with a large play barn, and big hill popular for flying kites. Special park features include a sundial, and a beautiful view of Seattle. Access to Lake Union is restricted at Gas Works Park, as the lake sediment contains hazardous substances.
Appear that that description omits the lede! But the park does seem singularly interesting per the Wiki article: https://en.wikipedia.org/wiki/Gas_Works_Park