Blow up the balloon to until its 3 or 4 inches wide. Tie the balloon tightly and tape the toothpick to the end of the balloon and secure well with tape. Cover the balloon in a layer of vegetable shortening and let it dry for about five minutes
Prepare your gelatin by sprinkling it over the water slowly and letting it fully absorb for 10 minutes. Melt the gelatin in short bursts of 15 seconds in the microwave until fully melted. Do not whisk, just stir gently or you'll incorporate air
Let gelatin cool for 5 minutes and scoop off excess white foam. Add a couple of drops of black food coloring and mix.
Dip your balloon into the gelatin and place onto the foam to dry for 5 minutes then dip again for a second coat. Let dry overnight
Once your balloon is dry, pop the balloon and pull it out of the gelatin bubble. Coat the hole with a little melted chocolate and place onto a silicone mat or parchment paper to cool in the fridge until set.
smoosh your cake scraps with the buttercream to create some cake clay and roll into a ball. This ball should be about half the size of the gelatin bubble. Roll the cake ball in the black sprinkles. Attach the gelatin ball to the cake ball with some more melted chocolate.
Add some legs by dipping the pretzel sticks into the melted chocolate and placing into the spiders body. Chill for 15 minutes.
Place a cake pop stick into the base of the spiders body with some more melted chocolate and push the spider topper into the top of the egg cake (see video for preparation)Glue on the second half of the spiders legs with some more melted chocolate. Add the sprinkles eyes and you're done!