Are LeapFrog-style electronic learning toys actually educational, or just noisy?

The consensus across r/toddlers and r/Parenting is mixed but leans positive: parents widely say books like the LeapFrog Learning Friends 100 Words help with vocabulary and language, while openly admitting the sounds and music are repetitive and 'annoying.' Several note kids gravitate to the music buttons, so supervision helps steer them toward the learning modes.