Do you mean praying mantis? I used to keep them have had ghosts and african lined which was my first mantis and very suitable for beginners they do need a fairly regular supply of live food and a well ventilated warm but slightly humid tall container with plenty of sticks so they can hang upside down to moult, best to go for a beginners species nymph to watch it grow, fed mine on fruit flies whilst really tiny and then on larger flies and crawlies as it got bigger they are generally very easy to look after dependant on species of course.