Secure orders can be placed online via credit card or PayPal, by phone, or by fax!

All online orders are now handled exclusively through our merged storefront which combines products from "What If...?" Scientific and Leave Only Bubbles. To visit the new store, please visit http://www.LeaveOnlyBubbles.com/. In addition to offering density flow models, What If Scientific—Leave Only Bubbles is the home to hundreds of other science-related curriculum supplies and our catalog is always expanding. To place an online order, please visit the new store or click on any corresponding "Buy Online" button found throughout this site to be directed to the appropriate ordering page. If you prefer to order offline, please use the Offline Order Form and mail or fax it to:

Density Flow Model "Original" ($389.00)

Density Flow Model "Junior" ($199.00)

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