Color:

New suspension blowing ball

plastic periscope

homemade bamboo raft

Rocket Launcher

Space Station (Battery-owned)

The New Eight Planets

Eight Planets (Colored)

Plastic tumbling capsules

Plastic reptile robot

Spring dynamometer (random color)

Orbiting satellite (battery-owned)

New Submarine

Wind direction

wheelbarrow

polarized light experiment

Balance Scale

New Madelberg Hemisphere

Salt water clock

Salt water power generation fan

Salt water power generation car

Four-wheel drive (battery-owned)

Tone glasses

Small plastic table lamp

No Panda

Upgraded Wooden Hand-cranked Generator

Basic wooden hand-cranked generator

Earthquake alarm (battery-owned)

Magic Box

Crab bionic robot (battery-owned)

Obstacle avoidance robot (battery-owned)

air cannon

new water wheel

air rocket launcher

Jade Rabbit Moon-looking Lantern

Flower full moon lantern

Little Star Lantern

blood circulation

tie-dyed handkerchief

Star projection lamp (battery-owned)

Water-proof clothing

Tumbler

Magnet walking maze

Kangaroo Jump

Magnifying glass looking for insects

Finage Mirror

Ha ha mirror

Black holes looking for insects

Monkey Beats

Cartoon clock

Paper Periscope

Frog predation

Human skeleton

Cognitive insects

Cognitive food

The magic mirror.

PH

Telescope

Clown walking on a tightrope

Piglet Skating

Lunar phase origin

The Secrets of Origami

Fingerprint painting

Homemade wind wheel

Homemade gyro

Rainbow Bridge

Wonderful little round stick

Milk animation

Fruit Power Generation

Oil-water mixing

Discoloration of tea

Thermal expansion and contraction of gas

Insect Movement

Kaleidoscope

Food travel.

Bamboo cicada

Seasons change

Little tadpoles grow up

Caged Bird

Facebook

Tumbling capsules

Tangram

Rainbow Water

Why is it less?

Thermochromic fish

Atmospheric pressure

Color transmission

Beads floating on the surface of the water

Floating picture