u can have the following , u can search it in Internet for these topics
1) THEODOLITE
2)CLINOMETER
3)PARABOLA, HYPO BOLA
4)SQUARE ROOT SPIRAL
5)VOLUME OF CONE = 1/VOLUME OF CYLINDER
With these u can have additional puzzles or games like
1)TOWER OF HANOI
2)8 SAFE QUEENS
3)DOT PUZZLES and many more
THEN HAVE FUN
THUMBS UP
ALL THE BEST