I have a number of logic trainers which I started buying with Digi-Comp I back in 1963 or so. I'm fascinated by the use of logic in human interaction. A man named Joseph Bialek sold a logic trainer called Compulogical Tutor in 1972 which had color-coded (Yellow-NOT, Green-OR, Red-AND, etc.) plastic cubes with connection pins on them for the gates. You could wire them up to use the four input switches and show the result on the four output lights. The Logic Trainer is comparable to that and if better in many ways. The board is very attractive and each gate is clearly labeled as to function. They also include a silk-screened truth table printed on the board for each gate! The print is very tiny, though, so unless you're young with perfect eyesight, keep a magnifying glass handy. Having batteries onboard makes it super portable and easy to use anywhere. The switches are all very reliable and give a satisfying click when activated. If you order, make sure to order the case. It makes the system so much nicer and possibly even more reliable since it allows you to set the tutor down on a conductive surface without creating short circuits. The connecting wires are terminated with standard DuPont female connectors and are widely available. They are also available from the seller for your convenience. I am having a ball with this board and can duplicate most of the circuits shown in standard texts on logic. You'll need one of those since all that's available from the seller is a single page Getting Started sheet.
The only suggestions I'd have are to include more of everything! More of the standard gates (AND, OR, NOT, etc.) would be welcome and I'd like two BCD counters since there are two digital displays and it would be good to be able to use both of them in a counter at the same time. I'd really like an official tutorial that specifically talks about this board rather than having to adapt generic logic texts, even though that's not too difficult a task.
All-in all, I'd recommend this board to students, teachers, and anyone interested in what actually goes on in those complicated-looking ICs.
GET ONE!