There's Only One Ronjos! Trusted since 1974!

Products tagged with human calculator

Fun Time Mental Logs

Fun Time Mental Logs

Human calculator! You add the sum of four bars rolled like dice 4 four digit numbers, fast than your spectator can type the first few digits on a calculator. Repeat over and over again. You can even you predict the sum on the opposite side!
$14.99
← Return to the back office    Free Standard Shipping for domestic orders over $ 100. Some restrictions apply. Hide