School of Rotational Symmetry T-shirt
Tessellated fish swim in all directions on this colorful t-shirt.
Grab Bag t-shirts are Ash Gray or White.
Pricing: $21 to $24.
Fractions and Percentages T-shirt
Printed on Front and Back
Front: "Half of all people don't get fractions or percentages..."
Back:" But the other 25% do just fine."
Black or Indigo Blue. Very limited stock.
Pricing: $21 ($24 for 2XL and larger).
Warning Engage Brain T-shirt
Printed on Front and Back
Front upper left chest: Stylized "Think" logo.
Back: "WARNING: Engage your brain before opening your mouth. In case of malfunction or loss of control, stop, back up, and try again."
Available in a variety of attractive colors.
Pricing: $18 to $21.
FIBBOOO Fibonacci Series T-shirt
The Fibonacci series (0, 1, 1, 2, 3, 5, 8, 13...) applied to the letters of Fibonacci's name (except that we skipped the zero). T-shirt is Black.
Pricing: $14 to $16.
