A metal plate with circles, for drawing circles onto paper or wooden targets for shooting training

A metal plate with circles, for easily drawing circles onto paper or wooden targets for shooting training.

A gap will show though at each circle, because
it needs to be one whole plate.
-But it's easy to fill these gaps at the traced circles.

Extra: A square version.
Extra 2: Versions with multiple smaller squares.

Extra 3: A version with multiple smaller circles.

Two ideas for electronic smellers

High range electronic smellers, long range, but aimed.

Electronic smellers which have a 360 degree radius but not that much reach. And it should be able to give the direction.

A plus shaped sniper bullet

A + shaped sniper bullet. For maximum tissue penetration.

Tests if a plus shaped bullet makes it easier to shoot enemies behind another enemy. Maybe shooting 3 to 4 or more enemies at the same time.

Full hard metal, + shaped sniper bullet. And the plus is a bit long.

Researching the difference between a real sound and a recorded sound, coming from a speaker

Researching the difference between a real sound and a recorded sound coming from a speaker.

For example researching the real sound coming from a metal object and the recording of that sound.

A device for finding small tire punctures

Small device for around a tire which has a puncture, which will detect where the puncture is.

The device should be openable and closable and small. And it should just detect air flow (easy).

Very well for finding a small tire puncture when being outside, more far away.

A strong and compact portable chair.

Strong and compact portable chair. Full metalic.
And maybe one with only padding.

With parts, which go inside the hollow top part.
And can be shoved and clicked into place, seperately.