Pixel Premium Magnetic Foam Letters Each pack of Pixel Premium Magnetic Foam Letters ($17) comes with an ultra-light magnetic dry-erase whiteboard and more than 40 learning games. Plus, the product touts itself as the "safer, superior choice" to other magnetic letters, as each letter has a completely magnetic back sealed in a rubber casing. Image Source: amazon.com Pixel Premium Magnetic Foam Letters $17 from amazon.com Buy Now