Algorithmic Thinking, 2nd Edition: Learn Algorithms to Level Up Your Coding Skills

Yunsailing 30 Pcs Valentines Day Kaleidoscopes Party Favors Vintage Mini Kaleidoscope Party Favor Educational Toy for Kids Return Gifts School Classroom Prizes Goodie Bag Fillers(Lovely)

ZhuoChiMall CMY Color Cube with Rotating Stand，2.0 inch (50 mm) Acrylic Prism CmyCube with Base, Office Desk Decoration Toys, Science and Education Gift for Kids，Silent Fidget Toys for Adult…

Handcrafted Etched Floral Pattern Lacquered Brass Kaleidoscope Includes Two Separate Turning Wheels-A Unique Gift to My Son, Grandson, Daughter. (6.5"x1")

Fengirl Kids Classic Paper Kaleidoscope, Best Gift Idea, 3 Pack (Random Color)

Jerify 72 Pieces Kaleidoscope Toys for Boys Girls Classic Kaleidoscopes Bulk Educational Toys Return Gifts for Birthday Party Favor Bag Fillers School Classroom Carnival Prize Random Pattern

Chivao 30 Pcs Classic Kaleidoscopes Kids Vintage Toys, Return Gifts for Kids Birthday Mini Kaleidoscope Kit for School Classroom Prizes, Stock Stuffers Bag Fillers, Random Colors(Stylish Style)

15 Pcs Classic Kaleidoscopes Kids Birthday Party Favor Old Fashioned Vintage Educational Toys Stocking Stuffers Goodie Bag Fillers for Classroom School Return Gifts Carnival Prizes (Cartoon Style)

Young4us 2 Pack 6-inch Crystal Optical Glass Triangular Prism for Photography, Kids, Science, Teaching Light Spectrum, Physics and Taking Photos Pictures (Set of 2, 150mm)