With purchases of $25 or more, Amazon offers Prime members the Wonderworld Musical Tree for $5.16 with free shipping. (Non-members can spend $49 to bag free shipping.) That's the lowest total price we could find by $15. It's made from rubber wood, formaldehyde-free glue, and non-toxic paints, dyes, and lacquers.

Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.