Kids' Crafts With Alka-Seltzer


Alka-Seltzer can be used for a multitude of things, including clever crafts for kids. Because of the reaction that Alka-Seltzer has with water, it makes for great homemade volcanoes, rocket ships, bubbling lava lamps and even soaring butterflies that will wow the kids. Make sure to set the crafts up outside as Alka-Seltzer and water is a messy combination.


  • Set a 16-ounce plastic soda bottle in the center of a baking pan and build the volcano up around it with modeling clay. Allow the modeling clay to dry overnight if you plan to paint it. Make sure not to cover the hole or drop any clay inside the bottle. Decorate the volcano by painting it brown and adding twigs and moss. Break four Alka-Seltzer tablets in half and put them inside the bottle. Fill the water bottle halfway with water and add 10 drops of red food coloring. Take the volcano outside and carefully pour the water into the the opening of the volcano. Watch the volcano explode and shoot red lava everywhere.

Rocket Ship

  • Find an old film canister and create a cone out of construction paper to fit around the canister. Flip the film canister upside down and tape the cone to it. Allow your child to decorate the rocket ship by drawing windows, taping wings and attaching red and orange ribbon to the bottom to look like fire. Take the rocket outside and flip it over. Fill a small container with warm water and fill the film canister half-full. Cut an Alka-Seltzer tablet in half. Allow your child to drop the tablet into the canister, put the lid on and flip it over. The rocket ship will soar through the air as the pressure causes the canister to burst open.

Lava Lamp

  • Remove the label from a 16-ounce plastic water bottle and fill it halfway with vegetable oil. Fill the bottle up the rest of the way with water, but leave 1 inch of space at the top. Add 10 drops of food coloring and position the bottle in the center of a pie pan or deep baking sheet to avoid a mess. Cut an Alka-Seltzer tablet into quarters with a butter knife and drop a quarter of a tablet into the bottle. Wait until the tablet stops bubbling and then drop in another quarter of a tablet. Put the lid on tightly and watch the lava lamp bubble up.

Soaring Butterflies

  • Purchase a glass jar with a small opening and plug it with a cork. Cut a hole in the center of the cork. A pumpkin carving tool will work well for this. Cut three small butterfly shapes out of tissue paper and fold them in half so the wings meet. They should be no larger than 2 inches folded. Break the tip off of a match stick and glue the stick part to the outside crease of the butterfly to create a stable body. Remove the cork from the jar and fill it half-full with water. Drop one Alka-Seltzer tablet into the jar and quickly replace the lid and funnel. Put the butterflies in the funnel and watch as the gas sends them soaring.

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