The "dokidoki" in the title signifies "nervous", "anticipating", "lovestruck", and probably a few other adjectives, all rolled into one. I opted to keep it as so the title wouldn't be too long.
Also, an "electronic block kit" is an educational toy designed to teach kids about circuits.
Wow, if I had one of those when I was a kid maybe I wouldn't have flopped that part of science class. S Saki's face in the 4th panel is hilarious.
Dokidoki Nodocchi*clatter*Miyanaga-san...Even though you said you hated mahjong...ELECTRONIC BLOCK KIT!!I hate mahjong!*BZZZZT*lie detectorSo...That means she actually doesn't hate mahjong...Actually... that's anHuh... but I actually do hate mahjong...