Magnetic Mainframe:

Occluder and Red/Green clip magnetically attaches for each placement and removal

Traslucent occluder is default choice, but you can also choose opaque or red

Red/Green Bar Reader

Brock String with luster disks and beads (glow in the dark)

Marsden Ball with Pull-Proof Disk

Pointer and multi-level straw

Transparent

Fusion Cards, Life-Saver, Eccentric Circles, Bulls-Eye, and Small Hart Chart

2 Versions of the Hart Chart, Arrow Chart, Shape Chart, R/G Column and Random Hart Chart 

Red Marker