3:01
A Mysterious Toy Made of Laundry Starch / Mr. Denjiro's Happy Energy! #526
でんじろう先生のはぴエネ!【公式】Mr. Denjiro's Happy Energy!
Observing Soap Film / Mr. Denjiro's Happy Energy! #539
2:49
Studying an Air Vortex Cannon / Mr. Denjiro's Happy Energy! #541
The Properties of Rubber / Mr. Denjiro's Happy Energy! #542
Marbling / Mr. Denjiro's Happy Energy! #543
3:00
Science Using an Everyday Item -A disc / Mr. Denjiro's Happy Energy! #588
How to Make an Underwater Soap Bubble / Mr. Denjiro’s Happy Energy! #724
