Hi, There is a great new buggy out, Phil and Ted, where one baby sits behind the other, it suits a baby and toddler brilliantly. Best I have ever seen.My daughter in law has one, kids are now 6mth and 2 years old. Easy to push, she also purchased as an extra., a cover similar to a rain cover, it is a sun cover which they can see through but it keeps the harmful sun rays away from kids. Well worth a look.
There is a 5 point safety harness on each seat, and a peekaboo sunroof so that both children can take in their surroundings as they travel. A padded headrest provides comfort for your babies, while a reversible handle makes it easier for you.