Walmart offers the Homedics myBaby Soundspa Lullaby Sound Machine and Projector, model no. MYB-S300, for $16.22. (Amazon charges the same with free shipping for Prime members.) Opt for in-store pickup to dodge the $5.99 shipping charge. That's the lowest price we could find by $13. It features a rotating picture projector, three lullabies, and an automatic on/off timer.