Taeda Farm and Janelle Says already appear to be very successful as far as merchandise sales go. But I really like what they did with their Mother's Day products and advertising for it. Even if they weren't famous, creating a personal connection with the customer with blogs, stories, and pictures can create longterm loyalty and sales.
The products are also presented in a professional and visually appealing way. I'm not surprised some of it is already sold out.
Also, Baby Janelle and Baby Joey are twins.