Questions and answers provide information about how cameras, elevators, car engines, tops, yo-yos, and other devices work. Includes charts, diagrams, and an activities section.

"About this title" may belong to another edition of this title.

Store Description

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Seller's business information

Booktrolls LLC
9600 Bamboo Rd, None, Houston, TX, 77041, U.S.A.

Sale & Shipping Terms

Terms of Sale

We guarantee the condition of every book as it's described on the Abebooks web
sites. If you're dissatisfied with your purchase (Incorrect Book/Not as
Described/Damaged) or if the order hasn't arrived, you're eligible for a refund
within 30 days of the estimated delivery date. If you've changed your mind about a
book that you've ordered, please use the Ask bookseller a question link to contact
us and we'll respond within 2 business days.

Shipping Terms

Orders usually ship same or next business day. If you place an expedited order for a heavy or over-sized book, we may contact you to request that you cover the extra shipping cost.

Shipping rates within U.S.A.

Shipping rates within U.S.A.
Order quantity	4 to 8 business days	2 to 6 business days
First item	US$ 0.00	US$ 0.99

Delivery times are set by sellers and vary by carrier and location. Orders passing through Customs may face delays and buyers are responsible for any associated duties or fees. Sellers may contact you regarding additional charges to cover any increased costs to ship your items.