Gelatinous Trampoline

Jelly is normally a wobbly, delicious food. But sometimes, characters in fiction can bounce on large moulds of jelly like trampolines.

Examples of Gelatinous Trampoline include:

Film- Animated

In Cloudy with a Chance of Meatballs, Flint takes Sam to a large castle made entirely of jelly, and they have fun bouncing around inside.
In Fun and Fancy Free, the Mickey and the Beanstalk segment had Goofy using a giant jelly pudding in that way.

In James Pond 2: Robocod, one stage is made entirely of jelly. The hero can bounce off the walls and platforms from all directions.
Ratchet & Clank Future: Tools of Destruction has the Gelanator, which allows Ratchet to shoot out cubes made of a gelatinous substance; which he can jump off of much higher than normal.
Banjo Tooie has this show up in several places in the Cloud Cuckooland level. Generally, the form it takes is a round red jelly.
Croc plays this completly straight, with rather out of place jelly trampolines.
- These make a return in Croc 2, so long as you aren't playing the American version, in which case, your bounce is provided courtesy of the springy chewiness of Lifesavers Gummies.
In the DS version of Sonic Colors, there are large domes of colorful gelatin in Sweet Mountain that, when landed on, bounce Sonic straight up or, if hit from the side, bounce Sonic in the opposite direction at full speed.
The levels "Jelly Pipe" and "Torrential Maze" from Yoshi's Story feature bouncy jelly in a Down the Drain setting.

Rusty and Co has an example in the paladin Madeline using Cube (a D&D Gelatinous Cube) as a long-distance trampoline, with the assistance of a rather long-looking drop in building momentum.

Jelly World in Neopets is this trope exactly—very bouncy and very edible. There's even a game which revolves around bouncing.
Played with in the Strong Bad Email winter pool, where Strong Bad fills a pool with gelatin and uses it to simulate surfing. When he wipes out and ends up sinking into the gelatin, Pom Pom tries to play lifeguard...and, true to this trope, he bounces off. Into orbit.

An episode of Dragon Tales had the gang mistake a giant mound of Wiggly Jiggly that Mungus the giant made earlier for his mother for a giant trampoline called a Bounceamount.
In Phineas and Ferb, the episode "Day of the Living Gelatin" had the duo turn an entire swimming pool into one giant gelatin trampoline.
Subverted in an episode of Ed, Edd 'n' Eddy, where the Eds make a giant pool of gelatin. Ed dives in and sinks to the bottom.
This happens often in Tom and Jerry and other cartoons with mice.