50% off storewide closeout sale!

This is a going-out-of-business sale. This was started as a family business, and since my divorce several years ago, my heart hasn't been in it. So I'm moving on.

Everything is 50% off, while it lasts! The discount happens as soon as you put something in your cart.

Several designs are completely sold out and no longer available, and most shirts have sold out in one or more sizes.

Click here to see shirts listed by sizes that are still available.

Click here for for Women's shirts sorted by available sizes.

Click here for for Youth shirts sorted by available sizes.

Orders over $200 get a 15 percent discount and free USA shipping; orders over $400 get a 20 percent discount and free USA shipping.

Adult XL

Products

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Useless Math T-shirt (XL only)

Features a valentine heart as the argument for functions from algebra, trigonometry differential and integral calculus, and linear algebra, with the caption "My normal approach is useless here".
This design is printed on a somewhat lighter weight shirt than our usual heavyweight t-shirts.
T-shirt is Black. T-shirt is Black. Available in XL only. $20.

Tyrannosaurus Drinks T-shirt (XL only)

Tyrannosaurus drinks - Tyrannosaurus drives - Tyrannosaurus Rex.
T-shirt is Ash Gray. Size XL only. $20.

SCIENCE! T-shirt
Comes in Adult and Youth sizes.

"SCIENCE!" spelled out using the shapes of various science-related items.

Price: $20.

Science is Awesome T-shirt

Dinosaurs, tornadoes, DNA double helix, and more. . . How could science not be awesome?
T-shirt is Navy Blue.

Price: $20.

Quadratic Formula T-shirt 3

Available in men's and women's sizes.

The quadratic formula with a diagram of a completed square, and the phrase "Solutions for the completely square."
Available in Black, Ash Gray, Violet, Yellow, Stone Blue, Navy Blue, or Orchid, depending on size.

Pricing: $20.
Blemish sale item: Stone Blue Small for $12.

PIRaTe Periodic Table T-shirt (Small, Large, XL)
Sizes Adult Small, Adult Large, Adult XL.

Price: $20. .

Pi Symbol Glow T-shirt
Glows in the dark!
Comes in Men's, Women's, and Youth sizes, and in Men's Long Sleeve.

Price: $20.

Pi Irrational But Well-rounded T-shirt
Printed on Front and Back.

Available in Adult t-shirt, Adult Sweatshirt, and Youth t-shirt. Front upper left chest: Pi symbol in a circle.
Back announces your true nature: "Irrational but Well-rounded"
Available in Ash Gray, White, Yellow, Lime Green, Dark Blue, and Light Green, depending on size.
Adult Sweatshirts available in Gray Medium and Gray 3XL.

Pricing: T-shirts: $20; Sweatshirts: $23.
Blemish Sale items: One Stone Blue XL at $15; one Yellow XL at $18.

Pi Digits T-shirt
BEST SELLER
Available in Adult, Women's, and Youth sizes.


Price: $20

Dare to be Differential T-shirt

Front: Know Limits
Back: Dare to be Differential

Available in Stone Blue, Ash Gray, White, and Yellow.

Price: $20.