Страна: Bulgaria
Pekunov Adrian
Mirchev Emil
Tambourkovsky Leon
Minkova Maya
Arabov Svetoslav
Kussev Teodor
4. Caffeine in tea leaves
10. Oil spot photometer
13. Invent Yourself: Myopia
21. Chromatography
2. Marinated meat
1. Inverse clepsydra
8. Parallax
14. Invent Yourself: Precipitates
25. Jumps
11. Two ends of a rope
5. Liquid umbrella (SF 1)