Hi, looking for some headphones for the kids, aged 3 & 5. Its mainly for in car dvd system, but the in ear bud ones it came with hurt the kids after a little while. So something thats small/cheap maybe folding for storage. Looked at so far PX 20/30 and folding Sony MDR-310LP. Would the neckband style be suitable for kids such as Philips SHS390. Also little worried these all may just fall off kids heads. Any advice would be much appreciated Thanks.