All I can remember about the movie was these kids used a remote control truck to drive in a lab or something and steal a tube of bright green stuff (ooze or radioactive)…I’m pretty sure it was in the 80’s, sometime time round when the movie Explores (kids movie) came out…
“The Manhattan Project” (1986)
“A teen and his girlfriend make an atomic bomb with plutonium stolen from a scientist dating his mother.”
There are a laboratory and a radio controlled toy in the movie.
I am pretty sure that this is your movie. If you agree, then please select my answer as Best Answer, there is an option for that.