[William Wheeler Hubbell, authorized to apply for patents.]

3.25

12 ratings

12

25

223

Leonardo

3.95

39 ratings

46

76

987

Captain Underpants and the Attack of the Talking Toilets

4.24

21 ratings

25

13

189

The twenty-one balloons

4.18

11 ratings

19

11

87

The Way Things Work

4.22

9 ratings

13

8

162

Elon Musk

4.07

160 ratings

163

146

1349

My inventions

4.00

10 ratings

10

14

197

Ben and Me

4.50

4 ratings

5

13

128

George's Secret Key to the Universe

4.17

6 ratings

6

9

63

Life 3.0

4.06

17 ratings

22

13

232