Twin boys 3 and a half. Had a bad day today, one isn't very well and is either really clingy or really naughty. The other had been given a very annoying toy he couldn't really use and wanted me to fix it constantly. For the sake of sanity and so I could look after poorly ds, I eventually took toy off him. Resulted in him having tantrum, them bizarrely he wanted to play tennis (never played it before) and was nagging to play.
Then I had the usual "I'm hungry, no I don't like that ...." . They have also started to shout and scream at me when things don't go their way. 
Anyone out there who is going through the same? Or can offer some advice?