How does it work with one parent and one child
Can recommend this as well, did it for 3 consecutive years. The Hinckley Island hotel is the best one we thought, Twycross Zoo is very good and Conkers was fun as well (although better for slightly older kids - ours were 5 and 7 when we went but probably aim for a couple of years older). Twinlakes is awesome for young kids but probably a 45 minute drive from the hotel. Also we paid for extra nights in the hotel, I think it was about £80 per night.
Are they all in Leicestershire?
We had a wonderful time doing this a few years ago when our kids were 7 and 4. We used the Hinkley Island hotel which was conveniently located - a business hotel that is quite deserted on a weekend. The breakfast was very good. On one day we visited Twinlakes which was surprisingly good, not Alton Towers but has plenty of good activities for younger kids and no queues. The second day we did the Space Centre which was also good fun. Overall brilliant value for a lovely very memorable weekend.