What science toys would you like to play with?

I used to play with balloons filled with hydrogen. I stopped doing that on May 6, 1937

I did my high school science project on bacteria, I talked my way into a lab at the local university, and the professor there was amazingly kind and let me use his equipment. I got to use a lot of gear related to that such as incubators, agar plates, pipettes, microscopes etc.

As far as cool equipment, I’d love to play with all of it (or at least get to “push the button” on the Large Hadron Collider) but I also recognize that any joy I would get out of it would probably come at the expense of science/humanity that could benefit more by not having a complete moron messing with it.

Was about to post Hubble Space Telescope! lol

Not a toy but I would like to be in a submarine during a war game with another sub.

I would like a portable but powerful laser, one that could burn through things or blow them up.

A microscope.

Something that creates weightlessness and something that creates a vacuum. I would like to see, for example, a broken egg floating in space. And it would be lovely to fumble and drop things as I often do and not have them land on the floor. Although then I suppose I would have to chase them.

Also one of those super-powerful microscopes that let you see subatomic particles, preferably in an excited state.

I appreciate @gorillapaws‘s remark about benefiting humanity, but this is imaginary, so I’m letting that concern pass me by.

I’ve used an electron microscope before. Very cool to see tiny, tiny things. But given the chance, I’d like to see really big things that are far away. A few days with the Hubble or JWST would be great.

I loved my years working in the medical lab with microscopes. Stained bacteria and human cells are gorgeous. I regret that it never occurred to me to photograph and frame some of them. That’s what I’d like to work with again.

A simple toy that I would like is something I saw in a museum. They had a vacuum tube with a feather and a rock in it. The two were simultaneously released and hit the ground at about the same time.