
Enter the lab of Professor X. Ploder as his assistant on a top-secret assignment: designing and testing a spy's pocket rocket. Then discover all about the science of rockets through practical experiments that you can try at home. Level 3 is for children able to read on their...


Enter the lab of Professor X. Ploder as his assistant on a top-secret assignment: designing and testing a spy's pocket rocket. Then discover all about the science of rockets through practical experiments that you can try at home. Level 3 is for children able to read on their...