We've just done the first step in making the volcanos.. the plaster moulds. If you follow the instructions, the plaster is too thin and runs out the bottom and sides of the mould leaving you short. Lucky we had two kits. Either mix the plaster thicker than instructions say or tape the sides and bottom of the mould. Create an exciting volcanic eruption with this earth science kit from National Geographic! Your child will get to cast their own volcano, paint it, and then make it erupt! This is a great family activity and provides fun for all ages. Everything you need is included. This science kit includes: Plaster Volcano mold Paints and paintbrush Create your own bubbling and erupting volcano using this National Geographic™ Volcano Making kit. With a fast drying plaster, six different paints, paint brush, volcano mold and stir stick, this kit helps you kick start your project effortlessly. Once the kit is ready, simply add baking soda and vinegar to see the magic of volcano eruptions. Find helpful customer reviews and review ratings for National Geographic Volcano Science Kit - Build an Erupting Volcano with this Volcano Kit for Kids, Multiple Eruption Experiments to Try, Great for Science Projects at Amazon.com. Read honest and unbiased product reviews from our users. Put 2 tablespoons of baking soda into the volcano. Measure out 2 tablespoons of baking soda and add these to the cup in your volcano. Make sure that the inside of the volcano is completely dry when you do this. Any moisture may cause the baking soda to fizz before you want it to. Description. They'll be learning and having fun with every step of the National Geographic Build Your Own Volcano Kit. Inside they'll find everything they need to build a volcano from scratch and then make it erupt. It's the ultimate in scientific fun. This is the complete science kit for kids, including a plaster and mould to create Create an unforgettable eruption with National Geographic's exciting Ultimate Volcano Science Kit. Your child will get to cast their own volcano (plaster and mold included), paint it (paint and brush provided), and then make it erupt (includes eruption powder)! What makes this kit ultimate is more eruption powder than ever. Find Ways to Play. I want to get activities for ages. Select an age range. that help with. Select topic. My child watches. Select show. and I want to see. Select activity type. National Geographic Break Your Own Geode Kit. $11.99. National Geographic Glow-in-the-Dark Crystal Kit. $11.99. National Geographic Crystal Garden Science Kit. $24.99. National Geographic Epic Science Series - Earth Science Kit. $14.99. Creativity for Kids Grow N' Glow Terrarium. Create an exciting volcanic eruption with this earth science kit from National Geographic! Your child will get to cast their own volcano, paint it, and then make it erupt! This is a great family activity and provides fun for all ages. Everything you need is included. This science kit includes: Plaster Volcano mold Paints and paintbrush Step 2. Insert the cut tube into the other paper towel tube. Let go of the inner tube so that it can expand inside the outer tube. If the inner tube is not sliding smoothly,remove it and wrap the edge slightly tighter. Then reinsert the inner tube into the other paper towel tube until it is just right. Cast your own volcano wi