Advice for a newbie teacher .

so we had our first lesson last week . the 2 brothers came together .i started with the older brother while the younger one watching for a bit then playing around . my 2 kids who are softmozart expert by now wanted to teach their friend , showing him all the cool stuff the software can teach we did guess key game and he loved it didnt want to stop , then he practiced 2 songs from the library , he did well left , right , then both . we did 5 finger exercises singing the notes . the little one kept asking when he gets to do it , he was so motivated he wanted to take over . sadly when i called him to come his brother went to play with my kids so i can focus on him but his enthusiasm faded a bit , he also wanted to finish quickly so he can go join the others playing . i think this is my problem , those are very close friends to my kids and if given choice they want to camp in our house and never go home i was thinking i have a spare laptop maybe if i can download the games that dont need piano for one to practice while the other playing the piano . what do you think ? i have to check if possible to use same license key on 2 different keyboards . now my main concern is not that but i dont see how those kids can progress by doing just one session a week with me , they have their own piano but their mum is not ready to invest in the software , she doesnt trust she can use it by herself , that is why she asked me to teach her kids , how do other kids who are learning with teachers do outside training session ?then i am a bit concerned about cost for the families , if they are to pay me private lessons and pay softmozart monthly subscription ? i appreciate your thoughts about all this .