66. True
=> (The students taking part in the club love discovering new things and learning science subjects.)
67. True
=> (You can use the things you have used such as empty bottles, old tyres of bicycle.)
68. False
=> (A water rocket doesn't cost you much.)
69. True
=> (When we use the pump to increase the pressure of the water, the rocket will take off and fly into the air.)
70. False
=> (These parts help the water go in the correct path as the members have planned.)
