Some of the toys are battery-powered while others require no batteries. Documented specifics in the listings: 4 AA — required and included; 3 AAA — required but not included; several items explicitly state “No Battery Used.”
Many toys include interactive features such as built-in songs and sounds, purring or meowing effects, recording and playback capability, and accessories like a retractable microphone.
Counts vary by product. One musical cat keyboard lists “20+ Songs” plus “7 witty kitty tunes.” Several interactive kitten toys list about 10 real-life or lifelike sounds, with some descriptions saying “over 10” sounds.
The listings highlight a mix of goals: music and auditory development, social skills, fine motor skills (especially for toddler activity toys), emotional development, and creativity for plush/soft toys.
Yes — several interactive kitten toys are sold as collectibles or surprise toys. Listings document variants such as “8 to collect” (including an ultra-rare variant), other sets listing “5 to collect,” and surprise capsules that include multiple components.